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Laki-laki = 22 siswa
Perempuan = 40-22 siswa = 18 siswa
Persentase perempuan = 18/40 x 100%
= 9/20 x 100%
= 45%
20. 0,45 + 1 1/4
= 0,45 + 1,25
= 1,70
21. 3,35 - 2 1/2 + 40%
= 3,35 - 2,5 + 0,4
= 0,85 + 0,4
= 1,25
22. 45% : 0,5 : 9/10
= 45/100 : 5/10 : 9/10
= 9/20 : 1/2 : 9/10
= 9/20 x 2/1 : 9/10
= 18/20 x 10/9
= 180/180
= 1
23. 6 : 15% x 3/8
= 6 x 100/15 x 3/8
= 2 x 100/5 x 3/8
= 200/5 x 3/8
= 600/40
= 60/4
= 30/2
= 15
24. ayam jantan = 12 ayam
ayam betina = 18 ayam
total seluruh ayam = 12+18 = 20 ayam
Perbandingan ayam betina dan total seluruh ayam:
= 18:20 = 9/10
25. Andi 3:4 Vinto
Total kelereng Andi = 15 butir
Kelereng Vinto = ... butir
Cara:
Keleren Vinto = 4/3 x 15 butir
= 4/1 x 5 butir
= 20 butir
Semoga membantu. Jadikan jawaban terbaik ya kalau boleh hehe terimakasih!